Biggest Celebrity Feuds Bracket: Vote In Our Tournament!

01/17/2013 04:07 pm ET

Just last week, the feud between Lady Gaga and Kelly Osbourne escalated when Sharon Osbourne posted an open letter criticizing the "Born This Way" pop star and her fans for bullying her daughter. And buzz surrounding Wednesday evening's "American Idol" premiere no doubt benefitted from rumors of a rivalry between new judges Mariah Carey and Nicki Minaj.

How do these two squabbles measure up with other recent celebrity feuds?

Round One voting opens today (January 17th) -- vote right now!

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Celebrity Feuds

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